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As some of you here know I have had a over cooling condition in my truck for quite a while. It seems to be getting worse. No matter what tstat i am using now the temp is hard pressed to get over 175 and will drop to 155 but seems to stay just below 170 most of the time. This is in 70 weather, in town or high way and with 2 of my winter fronts in place. I am on my 7th tstat with the same results. I even sent one of them to Mike and it runs fine for him. After 6 190* tstats and one cummins 180* tstat with almost the same results with them all I am at my wits end. I have also replaced the temp sender twice and no differance. I am wondering has anyone else here had this problem. Not long ago I replaced the heater core and refilled the engine thru the tstat hole and even put water in thru the heater supply and return. I cant beleieve there is any air in the block. The gauge will move between 155 and 175 but I cant get it any higher unles I am pulling the rv. But even then about 180 is the best I can seem to get.. I have noticed of late it the temp drops below 165 i get some EGT fluctuations and a little boost gauge fluctuations. If any body has had this problem I am very interested in hearing about them and any solutions you might have found.
